//登录用户文本框敲回车键

private void txtCode_KeyDown(object sender, KeyEventArgs e)

{

if (e.KeyCode == Keys.Enter)

{

txtPwd.Focus();

}

}

//登录密码文本框敲回车键

private void txtPwd_KeyDown(object sender, KeyEventArgs e)

{

if (e.KeyCode == Keys.Enter)

{

picLogin_Click(sender,e);

}

}